A new type of pelletizing rotary doctor device

Abstract

The application discloses a novel balling rotary scraper device, and belongs to the field of balling production equipment. The device comprises a fixed main shaft and a ring track assembly arranged coaxially, the ring track assembly is internally formed with a ring-shaped passing gap and is provided with a convex lifting guide section; a rotating sleeve is arranged outside the fixed main shaft, a plurality of scraper mechanisms are assembled on the rotating sleeve, the scraper mechanisms are matched with the track to realize periodic lifting in the process of revolution; the scraper mechanisms are provided with a rebound assembly, and a scraping rod is arranged at the lower part of the fixed main shaft. The device is installed on the upper part of a balling rotating disc, the scraper is lifted to avoid the rolling green balls when the scraper runs to the lower part of the rotating disc, and the device is matched with the rotation of the balling rotating disc to realize cleaning; the side wall of the device is in contact with the scraping rod and is deflected laterally to pass over during the lifting process of the scraper, and the rebound reset realizes automatic cleaning of accumulated materials; meanwhile, multiple dustproof structures are matched, which can effectively protect the internal transmission components, and the device also has a lateral buffering function, which reduces the damage probability of the scraper and the rotating disc, and is suitable for long-term stable use of the disc balling machine.

Description

Technical Field

[0001] This invention relates to the field of pellet production equipment technology, and in particular to a novel pelletizing rotary scraper device. Background Technology

[0002] In the pelletizing production line, the pelletizing turntable rotates continuously, and the mineral powder tumbles and agglomerates inside the turntable to form green pellets. During the turntable's operation, some powder tends to stick to the turntable wall and bottom. Long-term accumulation of material will change the forming conditions on the turntable surface and affect the uniformity of the green pellet size. Therefore, a scraper is needed to clean up the accumulated material.

[0003] Most existing rotary scrapers maintain a fixed height and continuously contact the disc surface for cleaning. The lower half of the pelletizing turntable is where green pellets concentrate and roll, and continuous contact with the scraper easily crushes and breaks them into smaller pellets. Simply shortening the scraper's cleaning range does not effectively control the material accumulation on the disc. At the same time, damp mineral powder easily adheres to the scraper's sidewalls, and the accumulated material reduces the scraping effect. Conventional solutions mostly require manual cleaning after machine shutdown.

[0004] In addition, traditional equipment's transmission components such as rollers and gears are directly exposed to dust, and mineral powder enters the friction pairs, resulting in rapid wear of parts and frequent maintenance; lacking a lateral buffer structure, the scraper is prone to problems such as blade deformation and liner scratches when it encounters hard clumps on the disc surface. Summary of the Invention

[0005] To address the technical problems existing in the background art, the present invention proposes a novel rotary scraper device for pelletizing.

[0006] The present invention proposes a novel rotary scraper device for pelletizing, comprising a fixed main shaft and an annular track assembly arranged coaxially. The fixed main shaft is fixedly connected to the annular track assembly through a connector. An annular passage gap is formed within the annular track assembly. The annular passage gap is provided with a raised lifting guide section with guide slope sections at both ends. A rotating cylinder is rotatably sleeved on the outside of the fixed spindle, and a driving component for driving the rotating cylinder to rotate circumferentially is installed on the top of the fixed spindle; multiple scraper mechanisms are circumferentially assembled at the bottom of the rotating cylinder, and the scraper mechanisms are axially slidingly engaged with the rotating cylinder and limited to fit within the annular passage gap, and can revolve with the rotating cylinder and adaptively rise and fall along the annular passage gap. The scraper mechanism includes a scraper body radially arranged below the annular track assembly and equipped with a spring-loaded assembly; a scraper rod is radially fixed at the bottom of the fixed main shaft, and the scraper rod is correspondingly located in the lifting guide section; when the scraper mechanism revolves and lifts, the side wall of the scraper body abuts against the scraper rod and is laterally deflected by the spring-loaded assembly to avoid it; after disengaging from the scraper rod, the spring-loaded assembly automatically resets, thereby realizing automatic cleaning of the deposits on the side wall of the scraper body.

[0007] Preferably, the annular track assembly includes an upper annular track and a lower annular track arranged in parallel and corresponding positions, with the annular passage gap formed between the upper and lower annular tracks; Multiple sets of first ribs are connected between the upper end face of the upper annular track and the outer wall of the top end of the fixed main shaft; multiple sets of second ribs are connected between the inner wall of the lower annular track and the outer wall of the bottom end of the fixed main shaft.

[0008] The upper and lower double-layer track, combined with rib support, provides higher overall structural rigidity, enabling the stable construction of an annular passage gap. This ensures that the track position remains coaxial with the fixed main shaft, resulting in smooth lifting and lowering operation, reduced deformation, and easier installation of subsequent dustproof covers.

[0009] Preferably, the scraper mechanism includes a sliding frame, a connecting rod, a rotating tube, a positioning frame, and a blade holder. The sliding frame is vertically slidably mounted on the outer wall of the rotating cylinder. One end of the connecting rod is fixedly connected to the sliding frame, and the other end is sleeved with the rotating tube. The end of the rotating tube is connected to the blade holder through the positioning frame. The scraper body is fixedly installed at the bottom of the blade holder, and the spring-loaded component is located between the connecting rod and the rotating tube.

[0010] The segmented assembly structure facilitates disassembly and maintenance, the sliding frame enables overall lifting, and the sleeve structure of the rotating tube and connecting rod provides an installation base for the lateral deflection of the scraper, making it convenient to arrange the rebound assembly.

[0011] Preferably, a positioning wheel is rotatably connected to the outer wall of the rotating tube. Limiting plates are provided on both sides of the positioning wheel. The positioning wheel is positioned within the annular passage gap between the upper and lower annular tracks. The limiting plates on both sides are respectively attached to and limited on the outer sides of the upper and lower annular tracks to achieve lateral limiting and anti-detachment during the operation of the scraper mechanism. The positioning wheel bears the lifting force, and the double-sided limiting plates restrict left and right movement to prevent the positioning wheel from leaving the track, ensuring the stability of the scraper lifting trajectory and avoiding running jams.

[0012] Preferably, the rebound assembly includes a first protrusion, a second protrusion, an arc-shaped limiting rod, a fixing member, and a spring. The first protrusion is disposed on the rotating tube, and the second protrusion is disposed on the connecting rod. The arc-shaped limiting rod is fixed to the first protrusion and moves through the second protrusion. A fixing member is assembled at the outer end of the arc-shaped limiting rod. The spring is sleeved on the outside of the arc-shaped limiting rod and presses against the fixing member and the outer wall of the second protrusion. Under normal conditions, the spring presses against the second protrusion, causing the first protrusion to abut against the second protrusion. The connecting rod and the rotating tube remain relatively fixed, and the scraper body maintains a vertical working posture. When the scraper body is subjected to lateral resistance, the rotating tube can rotate relative to the connecting rod and deflect the spring. After the external force is released, the spring rebounds and resets.

[0013] By relying on the preload provided by the spring, the scraper posture is kept stable during normal scraping, and it can also elastically yield when subjected to lateral impact, buffering the load and reducing the risk of damage to the scraper and ball-forming turntable liner.

[0014] Furthermore, the arc-shaped limiting rod and the outer side of the spring are fitted with dustproof sleeves.

[0015] It prevents damp mineral powder from entering the spring's moving area, thus preventing powder accumulation and jamming of the spring, and ensuring the reliable deflection and reset functions of the rebound assembly.

[0016] Preferably, the drive component has a mounting bracket on its outer side, which is fixed to the upper end of the fixed spindle. The output end of the drive component is connected to a drive gear, and a gear ring that meshes with the drive gear is fixed to the outer side of the upper end of the rotating drum. The drive component drives the rotating drum to rotate through the gear-gear meshing transmission. The gear meshing transmission has high transmission efficiency and stable power output. The mounting bracket centrally arranges the drive components, resulting in a compact layout and facilitating later maintenance of the drive unit.

[0017] Preferably, it also includes a dustproof protective cover, which is installed on the outside of the first and second ribs and covers the annular track assembly, the rotating drum and the driving component. The side wall of the dustproof protective cover is reserved with annular slits for the scraper mechanism to pass through, and the bottom of the protective cover is provided with a dust discharge port.

[0018] By enclosing key moving components such as tracks and gears inside, direct dust erosion is significantly reduced; a small amount of dust entering the protective cover can be discharged from the ash discharge port by gravity, preventing material accumulation inside the cavity.

[0019] Furthermore, a dust-blocking brush is provided inside the annular slit of the dustproof cover, and the dust-blocking brush is arranged around the annular slit in a complete circle; when the scraper mechanism rotates and passes through the annular slit, it squeezes the dust-blocking brush to undergo elastic deformation, allowing the scraper mechanism to pass smoothly. After the scraper mechanism disengages, the dust-blocking brush automatically springs back to its original position, sealing the slit gap and preventing external dust from entering the interior of the protective cover.

[0020] By utilizing the adaptive deformation properties of the brush, the gaps are continuously reduced while ensuring the normal passage of the scraper, thereby further improving the overall dustproof effect of the protective cover.

[0021] Furthermore, the scraper device is integrally assembled on the upper part of the pelletizing turntable, and the raised lifting guide section of the annular passage gap is set downwards; when the scraper mechanism revolves to the material area at the bottom of the turntable, it can automatically lift up to avoid material and prevent crushing and damage to the raw pellets.

[0022] Matching the working conditions of the pelletizing turntable, the track structure enables automatic mechanical blade lifting, eliminating the need for additional electrical or pneumatic components to avoid the raw pellets.

[0023] The novel pelletizing rotary scraper device proposed in this invention has the following beneficial effects: 1. This device relies on a circular track and positioning wheels to achieve the periodic raising and lowering of the scraper using a purely mechanical structure. The device is positioned above the pelletizing turntable. When the scraper reaches the lower part of the turntable during its revolution, it automatically rises to avoid the rolling green pellets below, preventing the pellets from being crushed; thus meeting production cleaning requirements.

[0024] 2. A fixed scraper bar is set in the scraper lifting area. When the scraper is lifted upward, the side wall contacts the scraper bar and is obstructed, causing it to deflect laterally and pass over the scraper bar. The scraper bar directly scrapes off the dust adhering to the side wall of the scraper. After the scraper is separated from the scraper bar, the rebound component quickly resets, further shaking off the residual material. This achieves self-cleaning of the scraper while avoiding green balls, without the need for manual cleaning by stopping the machine.

[0025] 3. A spring-loaded component is installed between the connecting rod and the rotary tube. When the scraper encounters hard lumps, it can be laterally deflected and buffered, reducing the risk of scraper breakage and scratching of the ball-forming turntable liner.

[0026] 4. Install enclosed dustproof protective covers and annular slit dust-blocking brushes, combined with local dustproof protective sleeves and dust removal structures, to provide multiple layers of protection for components such as gears, tracks, positioning wheels, and springs that are susceptible to dust, thereby reducing wear and minimizing the frequency of daily maintenance.

[0027] 5. The overall structure is centrally arranged on a fixed main shaft, making it compact and easy to retrofit onto existing disc pelletizing machines, thus offering strong versatility.

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the internal structure of the present invention; Figure 2 This is a schematic diagram of the structure of the ring track assembly in this invention; Figure 3 This is a schematic diagram of the structure of the present invention; Figure 4 This is a front view of the scraper mechanism in this invention; Figure 5 This is a schematic diagram of the structure of the springback assembly in this invention; Figure 6 This is a schematic diagram of the scraper body in the vertical position in this invention; Figure 7 This is a schematic diagram of the scraper body in the present invention when it is in an inclined state; Figure 8 This is a schematic diagram of the structure of the present invention after the dustproof protective cover is installed; Figure 9 This is a schematic diagram of the structure of the present invention installed on the ball-making turntable.

[0030] Explanation of the labels in the diagram: 1. Fixed spindle; 101. Drive component; 102. Drive gear; 103. Mounting bracket; 2. Circular track assembly; 201. Upper circular track; 202. Lower circular track; 203. Circular passage gap; 204. Raised lifting guide section; 205. First rib; 206. Second rib; 3. Rotary drum; 301. Gear ring; 4. Scraper mechanism; 401. Scraper body; 402. Sliding frame; 403. Connecting rod; 404. Rotary tube; 405. Positioning frame; 406. Scraper holder; 407. Positioning wheel; 408. Limiting plate; 5. Rebound assembly; 501. First protrusion; 502. Second protrusion; 503. Arc-shaped limiting rod; 504. Fixing component; 505. Spring; 6. Scraper bar; 7. Dustproof protective cover; 701. Annular slit; 8. Ball-making turntable. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figure 1-9 The device, a novel rotary scraper for pelletizing, is mounted on a mounting beam on the upper part of the pelletizing turntable 8. A fixed main shaft 1 is vertically positioned and connected to an annular track assembly 2 via a first rib 205, a second rib 206, and the fixed main shaft 1, ensuring that the axis of the annular track assembly 2 coincides with that of the fixed main shaft 1. The annular track assembly 2 consists of an upper annular track 201 and a lower annular track 202 arranged parallel to each other, forming an annular passage gap 203 between the two tracks. Within the annular passage gap 203, a raised lifting guide section 204 with gentle slopes on both sides is provided, with the raised lifting guide section 204 facing downwards.

[0033] The rotating drum 3 is mounted on the outside of the fixed spindle 1. A mounting bracket 103 is fixed to the upper end of the fixed spindle 1, and a drive component 101 is mounted on the mounting bracket 103. The output end of the drive component 101 is connected to a drive gear 102. A gear ring 301 is fixed to the outer wall of the upper end of the rotating drum 3. The drive gear 102 meshes with the gear ring 301, driving the rotating drum 3 to continuously rotate circumferentially around the fixed spindle 1. Multiple scraper mechanisms 4 are evenly arranged along the circumference of the outer wall of the rotating drum 3. A sliding frame 402 is vertically slidably installed on the outer wall of the rotating drum 3. One end of the connecting rod 403 is fixed to the sliding frame 402, and the other end is movably sleeved onto the rotating tube 404. A positioning wheel 407 is installed on the outside of the rotating tube 404. The positioning wheel 407 is placed in the annular passage gap 203 formed by the upper annular track 201 and the lower annular track 202. The limiting plates 408 on both sides of the positioning wheel 407 are respectively attached to the outside of the upper and lower tracks to restrict the left and right movement of the positioning wheel 407 and prevent it from derailing. The lower end of the rotating tube 404 is connected in sequence to the positioning frame 405, the blade holder 406 and the scraper body 401. The scraper body 401 extends radially to the bottom of the annular track assembly 2, facing the surface of the ball-forming turntable 8.

[0034] A spring-loaded assembly 5 is assembled between the connecting rod 403 and the rotating tube 404. One end of the arc-shaped limiting rod 503 is fixed to the first protrusion 501 of the rotating tube 404, and the other end moves through the second protrusion 502 on the connecting rod 403. A fixing member 504 is installed on the outer end of the arc-shaped limiting rod 503, and a spring 505 is fitted on the outside of the arc-shaped limiting rod 503. The two ends of the spring 505 abut against the fixing member 504 and the outer wall of the second protrusion 502, respectively. Under normal operating conditions, the pushing force of the spring 505 keeps the first protrusion 501 and the second protrusion 502 tightly fitted, locking the connecting rod 403 and the rotating tube 404 relative to each other, and keeping the scraper body 401 in a vertical position. When the scraper body 401 is subjected to resistance on the side, the rotating tube 404 can overcome the spring force of the spring 505 and deflect. After the resistance disappears, the spring 505 pushes the rotating tube 404 back to its original position.

[0035] A scraper rod 6 is radially mounted on the lower part of the fixed spindle 1, and the scraper rod 6 is positioned at the corresponding position in the raised lifting guide section 204. When the rotating drum 3 drives the scraper mechanism 4 to revolve and move to this area, the positioning wheel 407 climbs upward along the guide slope, and the entire scraper mechanism 4 is raised synchronously. During the scraper raising process, the side wall of the scraper body 401 contacts the stationary scraper rod 6. Under the obstruction of the scraper rod 6, the scraper body 401 is laterally deflected by the spring-loaded component 5 and successfully passes over the scraper rod 6. After the scraper is freed from the restriction of the scraper rod 6, the spring-loaded component 5 quickly resets. The scraper rod 6 directly scrapes off the mineral powder adhering to the side wall of the scraper, and the vibration generated by the reset further shakes off the residual accumulated material, completing the scraper self-cleaning operation.

[0036] The protective cover is supported and fixed by the first rib 205 and the second rib 206, enclosing the annular track assembly 2, the rotating drum 3, and the gear transmission mechanism. An annular slit 701 is formed on the side wall of the protective cover, allowing the scraper mechanism 4 to extend outwards; dust-blocking brushes are arranged around the inner side of the slit. When the scraper mechanism 4 passes through the slit, it compresses the brushes, causing elastic deformation. After passing through, the brushes rebound, narrowing the gap and preventing dust from entering the protective cover. A dust discharge port is provided at the bottom of the protective cover, allowing dust entering the cavity to be discharged outwards by gravity. A dustproof sleeve is installed on the outside of the arc-shaped limiting rod 503 and the spring 505 to prevent the spring 505 from jamming and failing due to the accumulation of damp mineral powder.

[0037] In this embodiment, during operation: the mounting bracket 103 is fixed to the top of the fixed spindle 1. The drive component 101 on the mounting bracket 103 is activated, driving the drive gear 102 to rotate. The drive gear 102 meshes with the gear ring 301 fixed to the upper end of the rotating drum 3, thereby driving the rotating drum 3 to continuously rotate around the fixed spindle 1. The fixed spindle 1 is connected to the annular track assembly 2 through the first rib 205 and the second rib 206. The annular track assembly 2 is composed of an upper annular track 201 and a lower annular track 202, forming an annular passage gap 203 between them. A raised lifting guide section 204 is provided within the annular passage gap 203.

[0038] Multiple scraper mechanisms 4 are assembled on the outer wall of the rotating drum 3. The sliding frame 402 in the scraper mechanism 4 can slide vertically along the rotating drum 3. One end of the connecting rod 403 is fixedly connected to the sliding frame 402, and the other end is sleeved with the rotating tube 404. The rotating tube 404 is equipped with the scraper body 401 through the positioning frame 405 and the blade holder 406. The outer side of the rotating tube 404 is equipped with a positioning wheel 407. The positioning wheel 407 is placed inside the annular passage gap 203. The limiting plates 408 on both sides of the positioning wheel 407 are respectively limited to the outer side of the upper annular track 201 and the lower annular track 202 to prevent the positioning wheel 407 from shifting laterally and derailing.

[0039] A spring-loaded assembly 5 is provided between the connecting rod 403 and the rotating tube 404. An arc-shaped limiting rod 503 is fixed on the first protrusion 501 and passes through the second protrusion 502. A fixing member 504 is installed at the end of the arc-shaped limiting rod 503. A spring 505 is fitted on the outside of the arc-shaped limiting rod 503. Under normal conditions, the spring 505 is pressed to make the first protrusion 501 and the second protrusion 502 abut against each other, and the scraper body 401 remains in a vertical position.

[0040] The entire device is arranged above the ball-making turntable 8. As the rotating drum 3 continues to rotate, the scraper mechanism 4 revolves synchronously. When the positioning wheel 407 moves to the raised lifting guide section 204, it is lifted along the slope, and the scraper mechanism 4 moves upward as a whole, so that the scraper body 401 moves away from the lower part of the ball-making turntable 8 and avoids the rolling balls in the turntable.

[0041] During the lifting process of the scraper mechanism 4, the side wall of the scraper body 401 contacts the scraper rod 6 arranged radially below the fixed main shaft 1. Under the blocking action of the scraper rod 6, the rotating tube 404 rotates by relying on the spring-loaded component 5, and the scraper body 401 deflects laterally and passes over the scraper rod 6. After being freed from the constraint of the scraper rod 6, the spring 505 pushes the rotating tube 404 to reset, scraping off and shaking off the powder adhering to the side wall of the scraper body 401.

[0042] The arc-shaped limit rod 503 and the spring 505 are equipped with dustproof sleeves to prevent dust from causing the rebound component 5 to jam; the external dustproof cover 7 has an annular slit 701 for the scraper mechanism 4 to extend out, which works with the dust-blocking brush to block dust and protect the internal components of the device to operate continuously and stably.

[0043] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A novel rotary scraper device for pelletizing, characterized in that: It includes a fixed main shaft (1) and an annular track assembly (2) arranged coaxially. The fixed main shaft (1) is fixedly connected to the annular track assembly (2) through a connector. An annular passage gap (203) is formed inside the annular track assembly (2). The annular passage gap (203) is provided with a raised lifting guide section (204) with guide slope sections at both ends. A rotating cylinder (3) is rotatably sleeved on the outside of the fixed spindle (1). A driving component (101) for driving the rotating cylinder (3) to rotate circumferentially is installed on the top of the fixed spindle (1). Multiple scraper mechanisms (4) are circumferentially assembled at the bottom of the rotating cylinder (3). The scraper mechanism (4) is axially slidingly engaged with the rotating cylinder (3) and is limited to fit within the annular passage gap (203). It can revolve with the rotating cylinder (3) and adaptively rise and fall along the annular passage gap (203). The scraper mechanism (4) includes a scraper body (401) radially arranged below the annular track assembly (2) and equipped with a spring-loaded assembly (5); a scraper rod (6) is radially fixed at the bottom of the fixed main shaft (1), and the scraper rod (6) is correspondingly located in the lifting guide section; when the scraper mechanism (4) revolves and lifts, the side wall of the scraper body (401) abuts against the scraper rod (6) and is laterally deflected by the spring-loaded assembly (5) to avoid passing it. After disengaging from the scraper rod (6), the spring-loaded assembly (5) automatically resets, thereby realizing the automatic cleaning of the deposits on the side wall of the scraper body (401).

2. The novel pelletizing rotary scraper device according to claim 1, characterized in that, The annular track assembly (2) includes an upper annular track (201) and a lower annular track (202) arranged in parallel with each other, and the annular passage gap (203) is formed between the upper annular track (201) and the lower annular track (202). Multiple sets of first ribs (205) are connected between the upper end face of the upper annular track (201) and the outer wall of the top end of the fixed main shaft (1); multiple sets of second ribs (206) are connected between the inner wall of the lower annular track (202) and the outer wall of the bottom end of the fixed main shaft (1).

3. The novel pelletizing rotary scraper device according to claim 1, characterized in that, The scraper mechanism (4) includes a sliding frame (402), a connecting rod (403), a rotating tube (404), a positioning frame (405), and a blade holder (406). The sliding frame (402) is vertically slidably mounted on the outer wall of the rotating cylinder (3). One end of the connecting rod (403) is fixedly connected to the sliding frame (402), and the other end is sleeved with the rotating tube (404). The end of the rotating tube (404) is connected to the blade holder (406) through the positioning frame (405). The scraper body (401) is fixedly installed at the bottom of the blade holder (406). The spring-loaded assembly (5) is located between the connecting rod (403) and the rotating tube (404).

4. The novel pelletizing rotary scraper device according to claim 3, characterized in that, The outer wall of the rotating tube (404) is rotatably connected to a positioning wheel (407). Both sides of the positioning wheel (407) are provided with limiting plates (408). The positioning wheel (407) is positioned within the annular passage gap (203) between the upper annular track (201) and the lower annular track (202). The limiting plates (408) on both sides are respectively attached to and limited on the outer side of the upper annular track (201) and the lower annular track (202).

5. The novel pelletizing rotary scraper device according to claim 1, characterized in that, The rebound assembly (5) includes a first protrusion (501), a second protrusion (502), an arc-shaped limiting rod (503), a fixing member (504), and a spring (505). The first protrusion (501) is disposed on the rotating tube (404), and the second protrusion (502) is disposed on the connecting rod (403). The arc-shaped limiting rod (503) is fixed to the first protrusion (501) and moves through the second protrusion (502). The outer end of the arc-shaped limiting rod (503) is fitted with a fixing member (504). The spring (505) is sleeved on the outside of the arc-shaped limiting rod (503) and presses against the fixing member (504) and the outer wall of the second protrusion (502). Under normal conditions, the spring (505) presses against the second protrusion (502), causing the first protrusion (501) to abut against the second protrusion (502). The connecting rod (403) and the rotating tube (404) remain relatively fixed, and the scraper body (401) maintains a vertical working posture. When the scraper body (401) is subjected to lateral resistance, the rotating tube (404) can rotate relative to the connecting rod (403) and compress the spring (505). After the external force is released, the spring (505) rebounds and resets.

6. The novel pelletizing rotary scraper device according to claim 5, characterized in that, The arc-shaped limiting rod (503) and the spring (505) are fitted with dustproof sleeves on their outer sides.

7. The novel pelletizing rotary scraper device according to claim 1, characterized in that, The drive unit (101) is provided with a mounting bracket (103) on the outside. The mounting bracket (103) is fixed to the upper end of the fixed spindle (1). The output end of the drive unit (101) is connected to a drive gear (102). The upper end of the rotating drum (3) is fixed with a gear ring (301) that meshes with the drive gear (102). The drive unit (101) drives the rotating drum (3) to rotate through the meshing transmission of the gear ring (301).

8. The novel pelletizing rotary scraper device according to claim 2, characterized in that, It also includes a dustproof cover (7), which is installed on the outside of the first rib (205) and the second rib (206) and covers the annular track assembly (2), the rotating drum (3) and the drive component (101). The side wall of the dustproof cover (7) is reserved with an annular slit (701) for the scraper mechanism (4) to pass through, and the bottom of the cover is provided with a dust discharge port.

9. The novel pelletizing rotary scraper device according to claim 8, characterized in that, The dustproof protective cover (7) has a dust-blocking brush inside the annular slit (701), and the dust-blocking brush is arranged around the annular slit (701) in a complete circle.

10. The novel pelletizing rotary scraper device according to claim 1, characterized in that, The scraper device is assembled on the upper part of the ball-making turntable (8), and the raised lifting guide section (204) of the annular passage gap (203) is set downward.

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